kern/82649: some request to DVDROM causes kernel panic

[Yuri]

>Number:         82649
>Category:       kern
>Synopsis:       some request to DVDROM causes kernel panic
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jun 25 18:30:20 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Yuri
>Release:        5.4 release i386 on AMD64 processor
>Organization:
NA
>Environment:
FreeBSD eagle.xxx.xxx 5.4-RELEASE FreeBSD 5.4-RELEASE #0: Sun May  8 10:21:06 UTC 2005     root at harlow.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
When using dvdrip, when it already read titles and was beginning to rip, was saying "Initializing..." kernel panic occured. See log below

Sometimes dvdrip works ok, sometimes causes some messages FAILURE .... request description, sometimes this causes panic.

----log----
Jun 25 11:05:17 eagle kernel: acd0: FAILURE - READ_BIG ILLEGAL REQUEST asc=0x00 ascq=0x00 error=4<ABORTED>
Jun 25 11:12:39 eagle syslogd: kernel boot file is /boot/kernel/kernel
Jun 25 11:12:39 eagle kernel:
Jun 25 11:12:39 eagle kernel:
Jun 25 11:12:39 eagle kernel: Fatal trap 12: page fault while in kernel mode
Jun 25 11:12:39 eagle kernel: fault virtual address     = 0xa000074
Jun 25 11:12:39 eagle kernel: fault code                = supervisor write, page not present
Jun 25 11:12:39 eagle kernel: instruction pointer       = 0x8:0xc05dce9a
Jun 25 11:12:39 eagle kernel: stack pointer             = 0x10:0xe3730cb8
Jun 25 11:12:39 eagle kernel: frame pointer             = 0x10:0xe3730cbc
Jun 25 11:12:39 eagle kernel: code segment              = base 0x0, limit 0xfffff, type 0x1b
Jun 25 11:12:39 eagle kernel: = DPL 0, pres 1, def32 1, gran 1
Jun 25 11:12:39 eagle kernel: processor eflags  = interrupt enabled, resume, IOPL = 0
Jun 25 11:12:39 eagle kernel: current process           = 25 (irq15: ata1)
Jun 25 11:12:39 eagle kernel: trap number               = 12
Jun 25 11:12:39 eagle kernel: panic: page fault
Jun 25 11:12:39 eagle kernel: Uptime: 14h4m1s
Jun 25 11:12:39 eagle kernel: Cannot dump. No dump device defined.
Jun 25 11:12:39 eagle kernel: Automatic reboot in 15 seconds - press a key on the console to abort
Jun 25 11:12:39 eagle kernel: Rebooting...
Jun 25 11:12:39 eagle kernel: Copyright (c) 1992-2005 The FreeBSD Project.
Jun 25 11:12:39 eagle kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994

>How-To-Repeat:
run dvdrip port on some DVD
>Fix:
NA
>Release-Note:
>Audit-Trail:
>Unformatted: